diff --git a/app/controllers/administrateurs/experts_procedures_controller.rb b/app/controllers/administrateurs/experts_procedures_controller.rb
index 64abc5c38..d86f00ca2 100644
--- a/app/controllers/administrateurs/experts_procedures_controller.rb
+++ b/app/controllers/administrateurs/experts_procedures_controller.rb
@@ -10,16 +10,10 @@ module Administrateurs
 
     def create
       emails = params['emails'].presence || [].to_json
-      emails = JSON.parse(emails).map { EmailSanitizer.sanitize(_1) }
-      @maybe_typos, no_suggestions = emails
-        .map { |email| [email, EmailChecker.check(email:)[:suggestions]&.first] }
-        .partition { _1[1].present? }
 
+      emails = check_if_typo(emails)
       errors = Array.wrap(generate_emails_suggestions_message(@maybe_typos))
 
-      emails = no_suggestions.map(&:first)
-      emails << EmailSanitizer.sanitize(params['final_email']) if params['final_email'].present?
-
       valid_users, invalid_users = emails
         .map { |email| User.create_or_promote_to_expert(email, SecureRandom.hex) }
         .partition(&:valid?)
@@ -78,14 +72,5 @@ module Administrateurs
     def expert_procedure_params
       params.require(:experts_procedure).permit(:allow_decision_access)
     end
-
-    def generate_emails_suggestions_message(suggestions)
-      return if suggestions.empty?
-
-      typo_list = suggestions.map(&:first).join(', ')
-      verification_link = view_context.link_to("vérifier l’orthographe", "#maybe_typos_errors")
-
-      "Attention, nous pensons avoir identifié une faute de frappe dans les invitations : #{typo_list}. Veuillez #{verification_link} des invitations."
-    end
   end
 end
diff --git a/app/models/concerns/email_sanitizable_concern.rb b/app/models/concerns/email_sanitizable_concern.rb
index d143c7c7d..b8818b1d2 100644
--- a/app/models/concerns/email_sanitizable_concern.rb
+++ b/app/models/concerns/email_sanitizable_concern.rb
@@ -8,6 +8,26 @@ module EmailSanitizableConcern
     end
   end
 
+  def generate_emails_suggestions_message(suggestions)
+    return if suggestions.empty?
+
+    typo_list = suggestions.map(&:first).join(', ')
+    verification_link = view_context.link_to("vérifier l’orthographe", "#maybe_typos_errors")
+
+    "Attention, nous pensons avoir identifié une faute de frappe dans les invitations : #{typo_list}. Veuillez #{verification_link} des invitations."
+  end
+
+  def check_if_typo(emails)
+    emails = JSON.parse(emails).map { EmailSanitizer.sanitize(_1) }
+    @maybe_typos, no_suggestions = emails
+      .map { |email| [email, EmailChecker.check(email:)[:suggestions]&.first] }
+      .partition { _1[1].present? }
+
+    emails = no_suggestions.map(&:first)
+    emails << EmailSanitizer.sanitize(params['final_email']) if params['final_email'].present?
+    emails
+  end
+
   class EmailSanitizer
     def self.sanitize(value)
       value.gsub(/[[:space:]]/, ' ').strip.downcase